COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 1 SECTION 26 0500 - COMMON WORK RESULTS FOR ELECTRICAL
PART 1 - GENERAL
1.1 SUMMARY
A. Section Includes:
1. Electrical equipment coordination and installation.
2. Common electrical installation requirements.
1.2 DEFINITIONS AND ABBREVIATIONS
A. The following definitions and abbreviations shall apply to Division 26 in its entirety unless noted otherwise.
1. EMT: Electrical metallic tubing 2. IMC: Intermediate metal conduit.
3. RMC: Rigid metallic conduit.
4. RNC: Rigid nonmetallic conduit.
5. GRC: Galvanized rigid conduit.
6. FMC: Flexible metal conduit.
7. LFMC: Liquidtight flexible metal conduit.
8. NRTL: Nationally recognized testing laboratory acceptable to the authorities having jurisdiction.
9. LED: Light emitting diode.
10. PIR: Passive infrared.
11. MCCB: Molded-case circuit breaker.
12. N.C.: Normally closed.
13. N.O.: Normally open.
14. OCPD: Overcurrent protective device.
15. SPD: Surge Protective Device(s), both singular and plural; also, transient voltage surge suppression.
16. GFCI: Ground fault circuit interrupter for personnel protection.
1.3 SUBMITTALS AND SHOP DRAWINGS
A. Submit for review all requested product data, shop drawings and samples. Trade names, manufacturers, and catalog numbers are mentioned herein and on the Drawings solely in order to establish a standard for the type, general design, and quality of product required. Other products similar in design of approved equal quality capable of fitting within the spaces allocated and complying with the Drawings and Specifications will be considered after the Contract is let unless "prior approval" requirements are set forth in these documents. Where two or more manufacturers or materials are named the Contractor may submit any of those named, provided they conform to the Specifications and design intent. The Engineer may require the submission of samples, particularly wherever equipment or appliances are visible in finished areas.
Demonstrations of a product's ability to perform as specified shall be arranged if required. Dimensional data and weights shall be included. Review of submittals and
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 2 shop drawings does not relieve the Contractor of the responsibility for fitting the equipment in the space allotted with space for electrical connection and for servicing, or for coordination of the work with that of other trades. Contractor shall review submittals and shop drawings and indicate by stamp or letter that he has reviewed them before forwarding them to the Engineer. Submittals and Drawings will be returned after review indicating whether or not exceptions are taken and the required procedure to be followed thereafter. Resubmission of revised submittals and shop drawings is required before construction is begun.
B. Corrections or comments made on the submittals and drawings during review do not relieve the Contractor from compliance with the requirements of the Drawings and Specifications. This review is for general conformance with the design concept of the project and general compliance with the information given in the Contract Documents.
The Contractor is responsible for confirming and correlating all quantities and dimensions, selecting fabrication processes and techniques of construction.
C. If the submittal deviates from the requirements of the Contract Documents, the deviation shall be clearly and easily identified in writing on the submittal. Identify where within the Contract Documents the deviation occurs. The deviation shall only be considered acceptable if the identified deviation has been initialed by the Engineer.
Any deviation not initialed may be assumed to be rejected. All coordination required due to the deviation, such as space allocation, changes to electrical service, or any other required changes shall be borne as Work of Division 26 but accomplished by Installers skilled in the Work being performed. No costs incurred by the approved deviation shall be borne by the Owner.
D. The products listed below shall be submitted for review after the award of the Contract and before any equipment or materials are purchased. If a product is unacceptable, another product shall be submitted.
1. Items to be submitted are:
a. Raceways b. Fuses
c. Identification products
d. Lighting fixtures and accessories e. Motor starters
f. Combination starter & disconnect switches g. Disconnect switches
h. Switchboards i. Circuit breakers
j. Fire alarm system components k. Conductors
l. Wiring devices
E. Further descriptions or information required with shop drawings shall be included with the description of materials specified herein as follows:
1. Motor Starters: Include dimensioned drawings of motor starters which have a NEMA size one or larger rating, their layout, and relation to associated equipment
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 3 2. Miscellaneous Electrical Controls and Control Wiring: Include control wiring
diagrams for all miscellaneous electrical controls.
3. Housekeeping Pads: Include location and dimensions of housekeeping pads, including blockouts and anchor bolts.
4. Firestops: Include all firestop materials for the project, indicating intended use and UL fire rating where applicable.
F. The Contractor is not relieved of the responsibility for dimensions or errors that may be contained on submissions reviewed by the Engineer, or for deviations from requirements in the Contract Documents. The Engineer's noting some errors but overlooking others does not grant the Contractor permission to proceed in error.
Regardless of any information contained in the shop drawings, product data and samples, the Contract Documents govern the work and are neither waived nor superseded in any way by the review of shop drawings, product data and samples.
1.4 COORDINATION
A. Coordinate arrangement, mounting, and support of electrical equipment with all other trades:
1. No foreign systems (HVAC, plumbing, gas, sprinkler, etc) shall be located in the dedicated equipment space above and below electrical panels, switchboards, motor control centers, and similar equipment. Refer to requirements of NFPA 70.
2. Connecting raceways, cables, wireways, cable trays, and busways shall be clear of obstructions and of the working and access space of other equipment.
Prepare and submit a complete set of Construction Coordination Drawings utilizing the dimensions of the actual equipment to be utilized and indicating the exact routing for all elements such as piping, cable tray, conduit, ductwork, fire sprinkler lines, etc., including conduit embedded in concrete, and paying close attention to sloped plumbing lines such as sanitary and storm sewer.
Provide Plan Views as well as sufficient Elevations and Sections to assure and demonstrate installation sequencing, access, and space coordination upon review.
Complete each Coordination Drawing and include on the drawing sign-off by each individual trade performing work in the affected area, as well as the Contractor. No work shall commence in the area covered by the specific drawing until review and acceptance of drawing. This requirement for Coordination Drawings is not authorization for the Contractor or individual trades to make any unauthorized changes to the Contract Drawings. Maintain all Design Drawing space allocations such as ceiling heights (maintaining an eight (8) inch high zone directly above the ceiling for flexibility), chase wall dimensions, equipment room sizes, etc., unless prior written authorization is received from the Engineer to deviate.
Work installed by a trade which interferes with work of any other trade will be corrected at no cost to the Owner.
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 4
1.5 SAFETY
A. In accordance with generally accepted construction practices, the Contractor shall be solely and completely responsible for conditions of the job site, including safety of all persons and property during performance of the work. This requirement will apply continuously and not be limited to normal working hours.
1.6 SCOPE OF WORK
A. Furnish all materials and equipment (except those items specifically stated in these Specifications or on the Drawings as being furnished by Owner or others), labor and incidentals required for the electrical work as indicated in these Specifications and Drawings and as required to make a complete and operating installation to the satisfaction of the Owner and Engineer.
B. Furnish competent supervision of the work to be performed at all times during the progress of the work.
1.7 DRAWINGS
A. The Drawings shall serve to indicate the general layout of the various items of equipment. However, layout of equipment, accessories, specialties wireways, and conduit systems are diagrammatic unless specifically dimensioned, and do not necessarily indicate every required fitting, elbow, transition, junction box/ pull box, or similar items required for complete installation.
B. In electrical equipment rooms (area), drawings indicate electrical equipment selected to fit in the space(s) provided with due consideration given to code required clearances and work of other trades.
C. Contractor shall furnish submittals and shop drawings as hereinafter specified which reflect verification that the location and dimensions of all equipment are consistent with the spaces allocated, that coordination with installed piping and equipment of other trades has been accomplished, and that all required operating and code mandated clearances are complied with.
1.8 JOB CONDITIONS
A. Carefully investigate structural conditions, wall furring and chase locations, and room finishes and make actual measurements on the job so that all equipment such as panelboards switches, receptacles, lighting fixtures, fire alarm stations, horns, annunciators, and accessories shall fit. Practical consideration shall be given to coordination of all visible devices with aesthetic and architectural design elements.
B. Verify all measurements and be responsible for the correctness of same before ordering any materials or doing any work. No extra charge or compensation will be allowed because of any difference between the actual measurements and those indicated on the Drawings. Any difference, which might be discovered by the Contractor, shall be submitted to the Engineer for consideration before proceeding with the work.
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 5
1.9 LAW AND PERMITS
A. The latest published enforced regulations of the State and Local Building Codes, National Fire Protection Association (NFPA) and National Electrical Code, with the latest tentative interim amendments, shall be considered as included in these Specifications, and all applicable requirements shall be fully complied with. Questions regarding interpretation shall be addressed to the Engineer.
B. Apply for all permits, licenses, and inspection certificates and pay all fees incidental to the carrying on of the electrical work. Give notice to the proper authorities in ample time for the work to be inspected and approved as it progresses, and conceal no work until approved by the electrical inspectors having jurisdiction. The National Electrical code and National Board of Fire Underwriters and all state and local rulings shall be observed and shall govern the character of this work. Should the Drawings or these Specifications in any way conflict with the Code, State, or local rules, promptly notify the Engineer in writing in order that necessary changes can be accomplished by appropriate modification.
C. Upon completion of the installation, a certificate of approval from the electrical inspection department having jurisdiction thereon shall be furnished to the Owner, and all fees shall be paid by the Contractor. The certificate of inspection shall not release the Contractor from any guarantee or warranty obligations set forth in these specifications.
1.10 EXAMINATION OF PREMISES
A. Visit the site of the proposed work, inspect the facilities and become familiar with the difficulties and restrictions attending the execution of the Contract. No additional compensation for failure to be so informed will be allowed.
1.11 DISCREPANCIES
A. Written clarification shall be obtained before submitting a proposal for the Work under this Division as to discrepancies or omissions from the Contract Documents, or questions as to the intent thereof.
B. Consideration will not be granted for misunderstanding of the amount of work to be performed. Tender of a proposal and/or bid conveys full agreement of the items and conditions specified, shown on the Drawings, and required by the nature of the project unless specific written exceptions are provided with the proposal and/or bid documents.
C. Disparities between the drawings and the specifications shall be highlighted to the Engineer for resolution.
D. Conflicting, incomplete or unclear drawings or specifications for equipment shall be highlighted to the Engineer. A Contractor who assumes a direction or equipment description in the face of an unclear specification, shall clarify his assumption to the Engineer so it may be confirmed prior to Bid and Equipment purchase.
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 6
1.12 GUARANTEE
A. All materials and workmanship shall be guaranteed for a period of one year, unless otherwise specified, from the date of acceptance of the project as substantially completed in accordance with the Drawings and specifications or when beneficially used by the Owner, whichever first occurs as certified by the Engineer. Defects due to faulty materials, methods of installation or workmanship shall be repaired or replaced promptly with the least inconvenience and without expense to the Owner, and at time designated by the Engineer. This guarantee is in addition to any specific performance guarantees called for in the individual paragraphs.
B. Submit five copies of all warranties and guarantees for systems, equipment, devices and materials (this includes four copies for maintenance manuals).
1.13 ROYALTIES AND PATENTS
A. Hold and save the Owner harmless from any patent violations in connection with items of equipment, wiring devices, or material furnished and installed.
1.14 STANDARDS AND REGULATIONS
A. The work under this Division shall comply with the latest enforced edition of the applicable standards and codes of the following:
1. UL, Underwriters' Laboratories, Inc.
2. NEMA, National Electric Manufacturers Association 3. NEC, National Electrical Code
4. Local and State Building Codes
5. ANSI, American National Standards Institute 6. IEEE, Institute of Electrical & Electronics Engineers 7. CBM, Certified Ballast Manufacturer
8. ASTM, American Society for Testing Materials 9. NFPA, National Fire Protection Association
10. IPCEA, Insulated Power Cable Engineers' Association 11. FM, Factory Mutual
12. ETL, Electrical Testing Laboratories 13. IES, Illuminating Engineering Society
14. OSHA, Occupational Safety and Health Administration
15. ASHRAE Standard 90.1-2007, Energy Standard for Buildings Except Low-Rise Residential Buildings
16. IBC, International Building Code
17. BICSI Telecommunications Distribution Design Manual
B. Include all items of labor and materials required to comply with such standards and codes. Where quantities, sizes or other requirements indicated on the Drawings, or herein specified are in excess of the requirements of the standards and codes, the Specifications and/or Drawings shall govern.
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 7
1.15 RECORD DRAWINGS
A. Upon completion of the project, furnish a complete set of the Drawings which will include all revisions/ sketches, etc., which may have been required during construction.
The Contractor shall mark these Drawings, in red pencil, to indicate exact, as-installed conditions.
B. The as-installed conditions shall reflect any changes in equipment location or routing which did not follow that shown on the Contract Drawings. The changes in conduit and/or wiring sizes shall be indicated on these Drawings. During course of the installation, Contractor shall maintain a separate set of Drawings of marking and noting all installation deviations. This set of Drawings shall be maintained continuously, and shall be used for no other purpose than indicating as-installed conditions.
1.16 MAINTENANCE MANUALS
A. Submit four copies, including wiring diagrams maintenance and operating instructions, parts listings, and copies of all other submittals required by this Division 26. Organize each maintenance manual with Table or Contents, Index, and thumb-tab marked for each section of information. Bind in 2", three ring binders, vinyl covered, with pockets to contain folded sheets. Properly label contents on spine and face of binder.
PART 2 - PRODUCTS
2.1 MATERIALS
A. Unless otherwise specified, all materials shall be new and unused and shall be listed by Underwriters' Laboratories, Inc., for the service intended.
2.2 COMPATIBILITY
A. Provide products which are compatible with other products of the electrical work, and with other work requiring interface with the electrical work, including electrical connections and control devices. For exposed electrical work, coordinate colors and finishes with other work. Determine in advance of purchase that equipment and materials proposed for installation will fit into the confines indicated, leaving adequate clearance as required by applicable codes, and for adjustment, repair, or replacement.
2.3 MANUFACTURERS’ NAMEPLATES
A. Each major component of the equipment shall have the manufacturer's name, address, model number, and rating on a plate securely affixed in a conspicuous place. The nameplate of a distributing agent will not be acceptable. NEMA Code ratings, or other data which are die-stamped into the surface of the equipment shall be stamped in an easily visible location.
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 8 2.4 PRODUCT DELIVERY, STORAGE, AND HANDLING
A. Ensure that all electrical equipment, devices, and materials arrive at the site in good condition, intact in factory package or crate. Any equipment found to be damaged shall be removed from the project site.
B. Store all electrical equipment, devices, and materials in factory containers or package until ready for use. Storage facility shall be a clean, dry, indoor space which provides protection against weather. Avoid damage by condensation by providing temporary heating when required.
C. Handle all electrical equipment, devices, and materials carefully to prevent breakage, denting or scoring of the finish. Damaged materials shall be removed from the project site.
PART 3 - EXECUTION
3.1 CUTTING, PATCHING AND PAINTING
A. Do all cutting and patching necessary for the installation of the work. Note that the integrity of any fire rated ceilings and/or ceiling-roof assemblies must be maintained.
No cutting, drilling, or insertion of sleeves which may weaken a structural member shall be done without consent of the Engineer. Finished floors, walls, and ceilings shall not be broken without consent of the Engineer. Patching and repairs shall be made by the affected trades at the responsibility and cost of the Contractor.
B. All patching and painting shall be accomplished so as to match finished materials, paint/ or other finish to the satisfaction of the Engineer.
3.2 WORKMANSHIP
A. Workmanship shall conform to the best electrical installation practice.
B. Equipment and accessories as installed shall be complete and operating. The exact location and arrangement of material and equipment shall be determined as work progresses to conform in the best possible manner with related work of other crafts. The work in all its details is subject to the approval of the Engineer. Any work or material which is rejected must be removed and replaced immediately.
3.3 TESTS
A. Provide all necessary testing equipment for making tests. All tests shall be made in the presence of the Engineer or a representative thereof. When test results are not satisfactory, the Contractor shall make such adjustments and changes as are necessary and shall notify the Engineer that he is ready for another test. Repeat the test or tests which disclosed the faulty or defective work or equipment, and make such additional tests as the Engineer deems necessary.
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 9 B. Check direction of rotation of all motors and reverse connections as necessary.
Contractor shall not attempt to “bump” motors while coupled to mechanical equipment that could be damaged by wrong rotation.
C. Contractor is to coordinate, furnish, and pay for all required and specified testing.
3.4 PROTECTION OF FIXTURES, MATERIAL AND EQUIPMENT
A. Continuously maintain adequate protection of stored materials and installed work.
Fixtures and equipment, whether stored under a roof or outside shall be tightly covered with sheet polyethylene or waterproof tarpaulin and protected against dirt, rust, moisture, chemical and mechanical injury. Materials and equipment shall not be stored directly on the ground nor in areas where they will be subject to physical injury from vehicular traffic or construction machinery. Contractor shall see to it that conduit and equipment installed by him is not used by other trades as supports for scaffolds or personnel. Delicate equipment shall not be delivered to the job site unless they can be placed in completed and protected areas. Conduit openings shall be capped or plugged during installation.
B. At the completion of the work, equipment, fixtures, exposed supports, and piping shall be cleaned to the satisfaction of the Engineer.
3.5 ALLOWANCES
A. Make due allowance for relocating any lighting fixture, wiring device, disconnect switch, motor controller, panelboard or equipment item, prior to installation (whether furnished by the Contractor or by others and requiring electrical connections), a distance of 5'0" or less from the locations indicated on the Drawings without additional cost to the Owner.
3.6 CLEANING UP AND HOUSEKEEPING
A. At the end of each work day, remove all debris, surplus materials or foreign matter (caused by the performance of the electrical work) from the premises. On completion of the work, the Contractor shall be responsible for leaving the premises in a clean condition.
B. Keep stocks of material and equipment stored on the premises in a neat and orderly manner.
3.7 LINES AND LEVEL
A. Contractor shall be responsible for the lines and levels of the electrical equipment, wireways, and conduit systems based on reference lines and bench marks established by the Contractor for the general work.
3.8 TEMPORARY WIRING, LIGHTING AND POWER AT THE SITE A. The Contractor shall be responsible for:
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 10 1. Furnishing and installing provisions for temporary lights and power during the
construction period conforming to all Federal local code and State Labor Law requirements. Temporary light and power provisions to be included shall be as hereinafter specified.
2. Arrangements for temporary service with the Utility Company.
3. Furnishing, installing, and maintaining all temporary service equipment as required until permanent service is installed and "alive", and switch-over of temporary systems on the permanent service when latter is ready for same.
4. Furnishing, installing, maintaining, and switching on and off, on all regular working days a complete temporary light system for the building while under construction.
5. Furnishing, installing/ and maintaining temporary power to permanent mechanical equipment requiring service before permanent feeders are ready for same.
6. Providing any and/or all relocations of the temporary electric facilities as necessary to clear the permanent installations of all trades.
7. Providing all required lighting for stairways to meet the requirements of all authorities having jurisdiction.
8. Furnishing and installing all required lighting for Owner’s signs.
9. Providing any temporary power for equipment space heaters.
3.9 WORK RELATED TO EQUIPMENT NOT FURNISHED AS WORK OF THIS DIVISION FOR SPECIFICATIONS
A. Unless specifically indicated otherwise any required electrical services for and required electrical connections to items shown on the Drawings and/or specified to be furnished in other divisions of the Specifications or by Owner shall be electrically connected as work of this section.
B. Electrical work for equipment specified in Division 23 Mechanical shall be as specified hereinafter.
3.10 MECHANICAL EQUIPMENT
A. In general line voltage work shall be done under Division 26.
B. All power wiring associated with Division 23, Mechanical, shall be done as work of Division 26, Electrical. All non-integral power disconnect switches and single speed manual starting switches, control power transformers and associated power wiring, shall be furnished and installed as indicated under Division 26.
C. Except as may be indicated on the Drawings and/or hereinafter noted, all low voltage control wiring, including all temperature control wiring, interlocking, start-top wiring, together with conduit for same will be furnished and installed under Division 23. This includes, but is not limited to, wiring to low voltage thermostats, damper motors, aquastats, firestats, pushbuttons, selector switches, and control panel. All disconnect switches for low voltage control wiring shall be furnished and installed under Division 23.
D. Work of other divisions shall include furnishing and setting motors.
COMMON WORK RESULTS FOR ELECTRICAL 26 0500 - 11 E. All magnetic starters will be furnished under Division 26, except for packaged
equipment that will be furnished under another division of the Specifications. Overload elements in all starters shall be selected according to actual motor nameplate full load current. Responsibility for this coordination shall lie with the division under which the particular starter was furnished.
F. Firestats and wall mounted thermostats which interrupt line voltage power circuits to motors will be furnished and set under Division 23, and electrically connected in the branch circuit wiring as work of Division 26.
3.11 COMMON REQUIREMENTS FOR ELECTRICAL INSTALLATION
A. Comply with NECA 1 and all applicable NFPA, ICC, and other standards required by the local authorities having jurisdiction.
B. Measure indicated mounting heights to bottom of unit for suspended items and to center of unit for wall-mounting items.
C. Headroom Maintenance: If mounting heights or other location criteria are not indicated, arrange and install components and equipment to provide maximum possible headroom consistent with these requirements.
D. Equipment: Install to facilitate service, maintenance, and repair or replacement of components of both electrical equipment and other nearby installations. Connect in such a way as to facilitate future disconnecting with minimum interference with other items in the vicinity.
E. Right of Way: Give to piping systems installed at a required slope.
3.12 FIRESTOPPING
A. Apply firestopping to penetrations of fire-rated floor and wall assemblies for electrical installations to restore original fire-resistance rating of assembly. Firestopping materials and installation requirements are specified in Division 07 Section "Penetration Firestopping."
END OF SECTION
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 0519 - 1 SECTION 26 0519 - LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND
CABLES
PART 1 - GENERAL
1.1 SUMMARY
A. This Section includes the following:
1. Building wires and cables rated 600 V and less.
2. Connectors, splices, and terminations rated 600 V and less.
B. Cable, Wire and Connectors:
1. Provide cable, wire and connector work as shown, scheduled, indicated and as specified.
2. The applications for cable, wire, and connectors on the project are as follows:
a. Power distribution circuitry
b. Lighting and appliance branch circuitry
c. Motor and other HVAC branch/feeder circuitry d. Equipment branch feeders
1.2 ACTION SUBMITTALS
A. Product Data: For each type of product used.
1.3 INFORMATIONAL SUBMITTALS
A. Field quality-control test reports.
1.4 QUALITY ASSURANCE
A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a NTRL acceptable to authorities having jurisdiction, and marked for intended use.
B. Comply with ANSI/NFPA 70.
PART 2 - PRODUCTS
2.1 CONDUCTORS AND CABLES
A. Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:
1. Alcan Products Corporation; Alcan Cable Division.
2. American Insulated Wire Corp.; a Leviton Company.
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 0519 - 2 3. General Cable Corporation
4. Southwire Company.
5. Phelps Dodge.
6. ITT Royal Electric.
7. Simplex.
8. Anaconda.
9. Triangle Conduit & Cable Co.
10. Okonite.
11. Raychem.
B. Copper Conductors: Comply with NEMA WC 70/ICEA S-95-658.
C. Aluminum Conductors: Comply with NEMA WC 70/ICEA S-95-658.
D. Conductor Insulation: Comply with NEMA WC 70/ICEA S-95-658 for Types THHN- THWN-2 & XHHW-2.
E. General: Except as otherwise indicated, provide cable, wire, and connectors of manufacturer's standard materials, as indicated by his published product information, designed and constructed as instructed by the manufacturer and as required for the installation. Provide factory-fabricated wire and cable of the size, rating, material, and type as indicated for each use.
F. 600 Volt Building Cable and Wire: Provide soft or annealed copper wires meeting, before stranding, the requirements of ASTM B3, "Standard Specification for Soft or Annealed Copper Wire for Electrical Purposes", latest edition.
1. All conductors shall be copper, single conductor heat and moisture resistant and thermal plastic insulated for all sizes, rated 600 volts.
a. Compact stranded aluminum conductors may be used for 3/0 aluminum and larger with CU/AL rated bolted lugs for termination.
1) Aluminum shall not be used for conductors between a motor controller of any type and motors associated with the chillers.
2) In any location where the contractor desires to use aluminum conductors, the contractor shall verify that the associated equipment installation requirements do not exclude the use of aluminum conductors. The contractor shall provide proof that aluminum is acceptable to be used as a conductor material for said equipment to the Engineer.
2. Conductors shall be solid up to and including size #10, stranded thereafter unless specified or noted otherwise.
3. Lighting branch circuit wiring and motor control wiring shall be suitable for 75°C operating temperature, of types appropriate for dry or wet locations.
Feeders, subfeeders and motor power wiring regardless of size shall be rated 600 volts and shall be suitable for 75°C operating temperature, of types appropriate for dry or wet locations.
4. Fixture wiring shall be 14 or 16 gauge, stranded, rated 600 volts and shall be suitable for 90°C operating temperature, (150°C under high temperature operating conditions) of types appropriate for dry or wet locations.
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 0519 - 3 5. Control wiring operated at 120VAC and above shall not be smaller than
#14AWG, and shall be copper, 98% conductivity, stranded with insulation rated not less than 600V, and suitable for 75°C operating temperatures in wet and dry locations.
6. Control wiring operated at 50VAC or DC and less shall not be smaller than
#16AWG, and shall be copper, 98% conductivity, stranded with insulation rated not less than 300V, and suitable for 75°C operating temperatures in wet and dry locations. Multiconductor wiring shall have an overall PVC jacket. Paired conductors shall be twisted and have 100% individual and overall shielding with copper drain wire and overall PVC jacket.
2.2 CONNECTORS AND SPLICES
A. Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:
1. AFC Cable Systems, Inc.
2. Hubbell Power Systems, Inc.
3. O-Z/Gedney; EGS Electrical Group LLC.
4. 3M; Electrical Products Division.
5. Tyco Electronics Corp.
6. Thomas & Betts.
7. Burndy.
B. Provide factory-fabricated connectors and splices of size, ampacity rating, material, type, and class for application and service indicated.
C. Taps, Splices and Terminations:
1. All secondary feeder taps shall be made of cast copper (with AL/CU rated connections where necessary), 2-bolt type connector, with insulating covers.
Terminal connections shall be made with 2-bolt, clamp type lugs
2. Taps and splices for branch circuit wiring #14 to #6 shall be made with approved solderless pressure spring connectors with insulating covers as manufactured by:
a. Minnesota Mining & Manufacturing Company b. Ideal Industries, Inc.
c. Buchanan Electrical Products Corporation
3. Tape shall be Scotch #33 and shall be applied so that the insulation is not less than that of the wire.
4. Cable supports shall consist of composition cable clamps.
PART 3 - EXECUTION
3.1 CONDUCTOR INSULATION AND WIRING METHODS
A. Exposed Feeders: Type THHN-THWN-2, single conductors in raceway.
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 0519 - 4 B. Feeders Concealed in Non-Accessible Ceilings, Walls, Partitions, and Crawlspaces:
Type THHN-THWN-2, single conductors in raceway.
C. Feeders Concealed in Concrete, below Slabs-on-Grade, and Underground:
Type THHN-THWN-2, or XHHW-2 single conductors in raceway.
D. Exposed Branch Circuits, Including in Crawlspaces: Type THHN-THWN-2, single conductors in raceway.
E. Branch Circuits Concealed in Non-Accessible Ceilings, Walls, and Partitions:
Type THHN-THWN-2, single conductors in raceway.
F. Branch Circuits Concealed in Concrete, below Slabs-on-Grade, and Underground:
Type THHN-THWN-2, single conductors in raceway.
G. Class 1, 2 Control Circuits: Type THHN-THWN-2, in raceway.
H. Two-hour fire-rated installations: Enclose conduit and wire in two hour fire-rated assembly. Alternately, subject to specific acceptance by the Authority Having Jurisdiction for this individual project as obtained by the Contractor, Mineral Insulated cables may be utilized to provide two-hour fire protection. Install Type MI Cable per NFPA 70 and manufacturer requirements.
3.2 INSTALLATION OF CONDUCTORS AND CABLES
A. Conceal cables in finished walls, ceilings, and floors, unless otherwise indicated.
B. Complete raceway installation between conductor and cable termination points according to Section 260533 "Raceways and Boxes for Electrical Systems" prior to pulling conductors and cables.
C. Use manufacturer-approved pulling compound or lubricant where necessary; compound used must not deteriorate conductor or insulation. Do not exceed manufacturer's recommended maximum pulling tensions and sidewall pressure values.
D. Use pulling means, including fish tape, cable, rope, and basket-weave wire/cable grips, that will not damage cables or raceway.
E. Install exposed cables parallel and perpendicular to surfaces of exposed structural members, and follow surface contours where possible.
F. Support cables according to Section 260529 "Hangers and Supports for Electrical Systems."
G. Identify and color-code conductors and cables according to this specification and Division 26 Section "Identification for Electrical Systems."
H. Install electrical cable, wire, and connectors as shown, in accordance with the manufacturer's written instructions, the applicable requirements of NFPA 70, the
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 0519 - 5 NECA's "Standard of Installation", and recognized industry practices to ensure that products serve the intended functions.
I. All wire and cable shall be delivered to the job in complete coils or reels with the manufacturer's name and approved tag attached thereto, indicating wire size and type of insulation and with the National Fire Protection Association's approval.
J. All branch circuit wiring for lighting fixtures, wiring devices, etc., shall be provided as required to complete the installation, and shall be connected to panelboard branch circuits in accordance with panelboard schedules.
K. Conductors used for the delivery of power to equipment at any voltage level and type shall not be installed in conduits carrying conductors used for any other purpose.
L. Conductors operating at a voltage of 120VAC and above shall not be installed in the same conduit as conductors operating at below 120VAC or DC.
M. Conductors of different systems shall not be mixed in the same conduit. For example, fire alarm system wiring shall be contained in its own conduit system and not in the conduit system of the building automation system, lighting system, etc.
N. In all cases, the requirements of NFPA 70 regarding voltage level of conductor insulation and their installation in conduits shall be adhered to.
O. Conductor size (and conduit size - if required) shall be increased in diameter as required to maintain a 5-percent minimum voltage drop.
P. Pull all conductors together when more than one is being installed in a raceway.
Whenever possible, pull all conductors into their respective conduits by hand. Use pulling compound or lubricant when necessary; compound shall not deteriorate conductor or insulation.
Q. Before any wire or cable is pulled into any conduit, thoroughly swab the conduit to remove all foreign material and to permit the wire to be pulled into a clean, dry conduit.
R. Run all feeders their entire length in continuous section without joints or splices.
S. Support all conductors in vertical raceways, as required by NFPA 70.
T. Do not permit conductors entering or leaving a junction or pull box to deflect so as to cause pressure on the conductor insulation.
U. Make joints in branch circuits only where such circuits divide. These shall consist of one through circuit to which shall be spliced the branch from the circuit.
V. Make all splices and connections in control circuit conductors using UL approved solderless crimp connectors.
W. Make all grounding connections using ground clamps, connectors, or exothermic welds of a type suitable and NRTL approved for duty involved.
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 0519 - 6 3.3 IDENTIFICATION
1. All secondary distribution feeders and branch circuit wiring #8 and smaller shall be factory color-coded in accordance with the following:
120/208 Volt 277/480 Volt
Phase A Black Brown
Phase B Red Orange
Phase C Blue Yellow
Neutral White or Grey White or Grey
Ground Green Green
2. #6 and larger conductors may utilize 1" banks of appropriate colored tape.
3. Control Wiring: All colors are allowed, except neutral wires shall be white or grey and ground wires shall be green.
4. Where conductors of same insulation characteristics carry unlike voltages and are installed in or pass through a common enclosure, such conductors shall be properly identified.
5. Where conductors are installed in or pass through a common enclosure, they shall be tagged to indicate clearly their circuit number, associated panel and destination. Tags shall be metal or fiber as hereinafter specified.
6. All control wiring shall be tagged at each termination point with a unique identification description used consistently throughout the wiring system. Tags shall be as manufactured by the Brady Company or approved equal.
3.4 CONNECTIONS AND SPLICES
A. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.
B. Make splices and taps that are compatible with conductor material and that possess equivalent or better mechanical strength and insulation ratings than unspliced conductors.
1. Use oxide inhibitor in each splice, termination, and tap for aluminum conductors.
C. Wiring at Outlets: Install conductor at each outlet, with at least 6 inches of slack.
D. After a splice is securely "made-up", insulate entire assembly with NRTL approved insulating tape to a value equivalent to the adjacent insulation.
E. No tape or splice shall be made in any conductor except in outlet boxes, pull boxes, junction boxes, splice boxes, or other accessible locations. Make all taps and splices by the use of an approved type compression connector. Insulate all taps and splices equal to that of the adjoining wire. Make splices or taps only on such conductors as are of a component part of a single circuit, properly protected by approved methods.
LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES 26 0519 - 7 3.5 FIELD QUALITY CONTROL (TESTING DETAILS)
A. Perform tests and inspections and prepare test reports.
B. Tests and Inspections: After installing conductors and cables and before electrical circuitry has been energized, test service entrance and feeder conductors for compliance with requirements.
1. Pre-Energization Check: Prior to energization, check cable and wire for continuity of circuitry and for short circuits. Correct malfunction when detected.
2. Feeder Insulation Resistance Test:
a. Tests shall be made using a Biddle Megger or equivalent test instrument at a voltage of not less than 1000 VDC at 480v and 500VDC at 208V. This voltage shall be applied for not less than one minute to the cable(s) being tested before taking a resistance reading. Resistance shall be measured from conductor to conductor and from conductor to ground. Insulation resistance shall not be less than the 1.0 Mega-Ohms or have greater than a 10% difference on conductors of the same feeder or circuit.
b. Conductors which do not meet or exceed the insulation resistance values listed above shall be analyzed, removed, replaced, and retested.
C. Remove and replace malfunctioning units and retest as specified above.
D. Test Reports: Prepare a written report to record the following:
1. Test procedures used.
2. Test results that comply with requirements.
3. Test results that do not comply with requirements and corrective action taken to achieve compliance with requirements.
END OF SECTION
GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS 26 0526 - 1 SECTION 26 0526 - GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS
PART 1 - GENERAL
1.1 SUMMARY
A. Provide electrical service and equipment grounding as shown, scheduled, indicated, and specified.
B. The types of electrical service and equipment grounding specified in this Section include, but are not necessarily limited to, grounding all equipment and devices shown, and as required by the National Electrical Code (NFPA 70), the State and Local Codes, Local Electrical Inspection Department and the Power Utility Company.
1.2 QUALITY ASSURANCE
A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a NRTL for intended use.
B. Comply with UL 467 for grounding and bonding materials and equipment.
PART 2 - PRODUCTS
2.1 CONDUCTORS
A. Insulated Conductors: Copper wire or cable insulated for 600 V unless otherwise noted or required by applicable Code or authorities having jurisdiction.
B. Bare Copper Conductors (sized as noted unless otherwise noted):
1. Solid Conductors: ASTM B 3.
2. Stranded Conductors: ASTM B 8.
3. Bonding Cable: 28 kcmil, 14 strands of No. 17 AWG conductor, 1/4 inch diameter.
4. Bonding Conductor: No. 4 or No. 6 AWG, stranded conductor.
5. Bonding Jumper: Copper tape, braided conductors, terminated with copper ferrules; 1-5/8 inches wide and 1/16 inch thick.
2.2 CONNECTORS
A. Listed and labeled by a NRTL for applications in which used, and for specific types, sizes, and combinations of conductors and other items connected.
B. Bolted Connectors for Conductors and Pipes: Copper or copper alloy, bolted pressure- type, with at least two bolts.
1. Pipe Connectors: Clamp type, sized for pipe.
GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS 26 0526 - 2 C. Welded Connectors: Exothermic-welding kits of types recommended by kit
manufacturer for materials being joined and installation conditions.
D. Bus-Bar Connectors: Mechanical type, cast silicon bronze, solderless compression-type wire terminals, and long-barrel, two-bolt connection to ground bus bar.
PART 3 - EXECUTION
3.1 APPLICATIONS
A. Conductors: Install solid conductor for No. 8 AWG and smaller, and stranded conductors for No. 6 AWG and larger, unless otherwise indicated.
B. Conductor Terminations and Connections:
1. Pipe and Equipment Grounding Conductor Terminations: Bolted connectors.
2. Underground Connections: Welded connectors, except as otherwise indicated.
3. Connections to Structural Steel: Welded connectors.
3.2 EQUIPMENT GROUNDING
A. Install insulated equipment grounding conductors with all feeders and branch circuits.
B. Air-Duct Equipment Circuits: Install insulated equipment grounding conductor to duct- mounted electrical devices operating at 120 V and more, including air cleaners, heaters, dampers, humidifiers, and other duct electrical equipment. Bond conductor to each unit and to air duct and connected metallic piping.
C. Grounding of all motors or equipment connected to terminal box with flexible conduit shall be made with separate grounding conductor between motor frame or equipment cabinet and rigid conduit system. Grounding conductor shall be sized in accordance with table 250-122 of NFPA 70.
3.3 INSTALLATION
A. Install grounding connections as shown and specified, in accordance with applicable portions of the NECA’s “Standard of Installation”, and recognized industry practices to ensure that products serve the intended functions.
B. Grounding Conductors: Avoid obstructing access or placing conductors where they may be subjected to strain, impact, or damage.
C. Bonding Straps and Jumpers: Install in locations accessible for inspection and maintenance, except where routed through short lengths of conduit.
1. Bonding to Structure: Bond straps directly to basic structure, taking care not to penetrate any adjacent parts.
2. Bonding to Equipment Mounted on Vibration Isolation Hangers and Supports:
Install so vibration is not transmitted to rigidly mounted equipment.
GROUNDING AND BONDING FOR ELECTRICAL SYSTEMS 26 0526 - 3 3. Use exothermic-welded connectors for outdoor locations, but if a disconnect-type
connection is required, use a bolted clamp.
D. Bonding Interior Metal Ducts:
1. Bond metal air ducts to equipment grounding conductors of associated fans, blowers, electric heaters, and air cleaners. Install bonding jumper to bond across flexible duct connections to achieve continuity. Refer to plans and details.
END OF SECTION
HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS 26 0529 - 1 SECTION 26 0529 - HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS
PART 1 - GENERAL
1.1 SUMMARY
A. This Section includes the following:
1. Hangers and supports for electrical equipment and systems.
2. Construction requirements for concrete bases.
B. Related Sections include the following:
1. Division 26 Section “Vibration Controls For Electrical Systems” for products and installation requirements.
C. Provide concrete, pedestals, bases, pads, curbs, anchor blocks, anchor bolts, slab inserts, hangers, channels, cradles, saddles, etc. for installation of equipment and apparatus shown on the Drawings and specified in the various sections of this Division 26, Electrical.
1.2 PERFORMANCE REQUIREMENTS
A. Design supports for multiple raceways capable of supporting combined weight of supported systems and its contents.
B. Design equipment supports capable of supporting combined operating weight of supported equipment and connected systems and components.
1.3 QUALITY ASSURANCE
A. Comply with NFPA 70.
1.4 COORDINATION
A. Coordinate size and location of concrete bases. Cast anchor-bolt inserts into bases.
Concrete, reinforcement, and formwork requirements are specified in Division 03.
B. Coordinate installation of roof curbs, equipment supports, and roof penetrations. Refer to Division 07 Section “Roof Accessories.”
PART 2 - PRODUCTS
2.1 SUPPORT, ANCHORAGE, AND ATTACHMENT COMPONENTS
A. Steel Slotted Support Systems: Comply with MFMA-4, factory-fabricated components for field assembly.
HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS 26 0529 - 2 1. Metallic Coatings: Hot-dip galvanized after fabrication and applied according to
MFMA-4.
2. Nonmetallic Coatings: Manufacturer's standard PVC, polyurethane, or polyester coating applied according to MFMA-4.
3. Painted Coatings: Manufacturer's standard painted coating applied according to MFMA-4.
4. Channel Dimensions: Selected for applicable load criteria.
B. Conduit and Cable Support Devices: Steel hangers, clamps, and associated fittings, designed for types and sizes of raceway or cable to be supported.
C. Support for Conductors in Vertical Conduit: Factory-fabricated assembly consisting of threaded body and insulating wedging plug or plugs for cables in riser conduits. Plugs shall have number, size, and shape of conductor gripping pieces as required to suit individual conductors or cables supported. Body shall be malleable iron.
D. Structural Steel for Fabricated Supports and Restraints: ASTM A 36/A 36M, steel plates, shapes, and bars; black and galvanized.
E. Mounting, Anchoring, and Attachment Components: Items for fastening electrical items or their supports to building surfaces include the following:
1. Powder-Actuated Fasteners: Threaded-steel stud, for use in hardened portland cement concrete, steel, or wood, with tension, shear, and pullout capacities appropriate for supported loads and building materials where used.
2. Mechanical-Expansion Anchors: Insert-wedge-type, zinc-coated steel, for use in hardened portland cement concrete with tension, shear, and pullout capacities appropriate for supported loads and building materials in which used.
3. Concrete Inserts: Steel or malleable-iron, slotted support system units similar to MSS Type 18; complying with MFMA-4 or MSS SP-58.
4. Clamps for Attachment to Steel Structural Elements: MSS SP-58, type suitable for attached structural element.
5. Through Bolts: Structural type, hex head, and high strength. Comply with ASTM A 325.
6. Toggle Bolts: All-steel springhead type.
7. Hanger Rods: Threaded steel.
2.2 FABRICATED METAL EQUIPMENT SUPPORT ASSEMBLIES
A. Description: Welded or bolted, structural steel shapes, shop, or field fabricated to fit dimensions of supported equipment.
B. Materials: Comply with requirements in Division 05 Section “Metal Fabrications” for steel shapes and plates.
HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS 26 0529 - 3 PART 3 - EXECUTION
3.1 APPLICATION
A. Comply with NECA 1 and NECA 101 for application of hangers and supports for electrical equipment and systems except if requirements in this Section are stricter.
B. Maximum Support Spacing and Minimum Hanger Rod Size for Raceway: Space supports for EMT and RMC as required by NFPA 70. Minimum rod size shall be 1/4 inch in diameter.
C. Multiple Raceways or Cables: Install trapeze-type supports fabricated with steel slotted support system, sized so capacity can be increased by at least 25 percent in future without exceeding specified design load limits.
1. Secure raceways and cables to these supports with two-bolt conduit clamps.
D. Spring-steel clamps designed for supporting single conduits without bolts may be used for 1-1/2-inch and smaller raceways serving branch circuits and communication systems above suspended ceilings and for fastening raceways to trapeze supports.
3.2 SUPPORT INSTALLATION
A. Comply with NECA 1 and NECA 101 for installation requirements except as specified in this Article.
B. Raceway Support Methods: In addition to methods described in NECA 1, EMT, IMC, and RMC may be supported by openings through structure members, as permitted in NFPA 70.
C. Strength of Support Assemblies: Where not indicated, select sizes of components so strength will be adequate to carry present and future static loads within specified loading limits. Minimum static design load used for strength determination shall be weight of supported components plus 200 lb.
D. Mounting and Anchorage of Surface-Mounted Equipment and Components: Anchor and fasten electrical items and their supports to building structural elements by the following methods unless otherwise indicated by code:
1. To Wood: Fasten with lag screws or through bolts.
2. To New Concrete: Bolt to concrete inserts.
3. To Masonry: Approved toggle-type bolts on hollow masonry units and expansion anchor fasteners on solid masonry units.
4. To Existing Concrete: Expansion anchor fasteners.
5. Instead of expansion anchors, powder-actuated driven threaded studs provided with lock washers and nuts may be used in existing standard-weight concrete 4 inches thick or greater. Do not use for anchorage to lightweight-aggregate concrete or for slabs less than 4 inches thick.
6. To Steel: Spring-tension clamps.
7. To Light Steel: Sheet metal screws.
HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS 26 0529 - 4 8. Items Mounted on Hollow Walls and Nonstructural Building Surfaces: Mount
cabinets, panelboards, disconnect switches, control enclosures, pull and junction boxes, transformers, and other devices on slotted-channel racks attached to substrate.
E. Drill holes for expansion anchors in concrete at locations and to depths that avoid reinforcing bars.
F. Pipe straps and hanger rods shall be fastened to concrete by means of inserts or expansion bolts, to brickwork by means of expansion bolts, and to hollow masonry by means of toggle bolts. Wooden plugs and shields shall not be used for fastening pipe strips and hangers.
G. Vertical runs of conduit in cores and closets shall be supported at every floor; support intervals must not exceed 14 ft.
H. Under no circumstance shall the ductwork, piping and mechanical equipment be used for supporting electrical facilities.
3.3 INSTALLATION OF FABRICATED METAL SUPPORTS
A. Comply with installation requirements in Division 05 Section “Metal Fabrications” for site-fabricated metal supports.
B. Cut, fit, and place miscellaneous metal supports accurately in location, alignment, and elevation to support and anchor electrical materials and equipment.
C. Field Welding: Comply with AWS D1.1/D1.1M.
3.4 CONCRETE BASES
A. Construct concrete bases so that base extends 4” beyond the equipment outline on all four sides. Anchors shall be a minimum of 10 bolt diameters from edge of the base – adjust base size as necessary to meet this requirement.
B. Finish tops of housekeeping pads smooth and level within 1 percent of span.
C. Use 3000-psi, 28-day compressive-strength concrete. Concrete materials, reinforcement, and placement requirements are specified in Division 03 Section.
D. Anchor equipment to concrete base.
1. Place and secure anchorage devices. Use supported equipment manufacturer's setting drawings, templates, diagrams, instructions, and directions furnished with items to be embedded.
2. Install anchor bolts to elevations required for proper attachment to supported equipment.
3. Install anchor bolts according to anchor-bolt manufacturer's written instructions.
HANGERS AND SUPPORTS FOR ELECTRICAL SYSTEMS 26 0529 - 5 E. Concrete pads for floor mounted electrical equipment shall be 4” high, unless otherwise
indicated, poured integral with the floor slab wherever practical. Wherever integral slab poured pads are not practicable, construct 4 inch high housekeeping pads, reinforced with No. 3 steel wire mesh 6 x 6 inches, fastened to structural slabs with ½ inch diameter bolts embedded in structural slabs with expansion bolts at all corners (inset 3 inches) and no further apart than 18 inches, score structural slab thoroughly to assure concrete bonding between structural slab and housekeeping pad.
3.5 PAINTING
A. Touchup: Clean field welds and abraded areas of shop paint. Paint exposed areas immediately after erecting hangers and supports. Use same materials as used for shop painting. Comply with SSPC-PA 1 requirements for touching up field-painted surfaces.
1. Apply paint by brush or spray to provide minimum dry film thickness of 2.0 mils.
B. Touchup: Comply with requirements for cleaning and touchup painting of field welds, bolted connections, and abraded areas of shop paint on miscellaneous metal.
C. Galvanized Surfaces: Clean welds, bolted connections, and abraded areas and apply galvanizing-repair paint to comply with ASTM A 780.
END OF SECTION
RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS 26 0533 - 1 SECTION 26 0533 - RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS
PART 1 - GENERAL
1.1 SUMMARY
A. This Section includes raceways, fittings, boxes, enclosures, and cabinets for electrical wiring.
B. Provide electrical raceways and fitting work, wiring gutters, electrical box and fitting work as shown, scheduled, indicated and as specified.
C. The types of electrical raceways and fittings for the project include the following:
1. Rigid steel
2. Electrical metallic tubing 3. Flexible metal conduit
4. Liquidtight flexible metal conduit 5. Rigid non-metallic conduit 1.2 ACTION SUBMITTALS
A. Product Data and Intended use and Location for: raceways, boxes, and enclosures.
1.3 QUALITY ASSURANCE
A. Comply with NFPA 70.
PART 2 - PRODUCTS
2.1 GENERAL REQUIREMENTS
A. Listed and labeled as defined in NFPA 70, by a NRTL, and marked for intended location and application.
B. Provide metal and non-metallic conduit, tubing, and fittings of the type, grade, size, and weight (wall thickness) as shown and required for each service. Where type and grade are not indicated, provide proper selection to fulfill the wiring requirements and complying with the NFPA 70 for electrical raceways.
C. Conduit shall be provided in standard 10-ft. lengths, each length shall be NRTL marked. Conduit shall not be smaller than 1/2" except where noted otherwise.
D. Couplings, connectors, and fittings shall be approved type specifically designed and manufactured for the purpose. NRTL Label: All electrical raceways and fittings shall be NRTL labeled.
RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS 26 0533 - 2 2.2 METAL CONDUIT AND TUBING
A. Manufacturers: Subject to compliance with requirements, provide products produced by one of the following (or equal):
1. Galvanized Rigid:
a. Allied Tube & Conduit Corp.
b. Jones & Laughlin Steel Corp.
c. Republic Steel Corp.
d. Triangle PWC, Inc.
e. Youngstown Sheet & Tube 2. EMT:
a. Allied Tube & Conduit Corp. Anaconda Co.
b. ETP-Uni-Couple
c. Jones & Laughlin Steel Corp.
d. Republic Steel Corp.
e. Triangle PWC, Inc.
f. Youngstown Sheet & Tube 3. Liquidtight Flexible Metal:
a. Anaconda Metal Hose b. Electri-Flex Co.
c. Flexi-Guard, Inc.
d. Triangle PWC, Inc.
4. Raceway Fittings:
a. Amoco Chemicals Corp.
b. Appleton Electric Co.
c. Carlon d. Crouse Hinds e. Efcor Division f. ETP-Uni-Couple g. O.Z. Gedney Co.
h. Raco, Inc.
i. Republic Steel Corp.
j. Steel City
B. GRC: Comply with ANSI C80.1 and UL 6.
C. EMT: Comply with ANSI C80.3 and UL 797.
D. LFMC: Liquidtight Flexible Metal Conduit:
1. Type: Single strip, continuous, flexible, interlocked, double-wrapped steel, galvanized inside and outside; forming smooth internal wiring channel; with liquidtight jacket of flexible PVC.
2. Liquidtight Flexible Metal Conduit Fittings: Liquidtight, zinc-coated steel.
E. Fittings for Metal Conduit: Comply with NEMA FB 1 and UL 514B listed for type and size raceway with which used, and for application and environment in which installed
RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS 26 0533 - 3 1. Conduit Fittings for Hazardous (Classified) Locations: Comply with UL 886 and
NFPA 70.
2. Fittings for EMT:
a. Material: Steel.
b. Type: Setscrew fittings allowed indoors. Weather proof compression fittings shall be used outdoors.
3. Expansion Fittings: steel to match conduit type, complying with UL 651, rated for environmental conditions where installed, and including flexible external bonding jumper.
F. Joint Compound for GRC: Approved, as defined in NFPA 70, by authorities having jurisdiction for use in conduit assemblies, and compounded for use to lubricate and protect threaded conduit joints from corrosion and to enhance their conductivity.
G. The exterior and interior surfaces of all rigid steel conduit and steel electrical metallic tubing shall be thoroughly and evenly protected against corrosion with a zinc coating.
The galvanized protection shall be coated with either a lacquer or enamel finish both inside and outside.
2.3 NONMETALLIC CONDUIT AND TUBING
A. RNC: NEMA TC 2, Type EPC-40-PVC or EPC-80-PVC, unless otherwise indicated.
B. Fittings for RNC: NEMA TC 3; match to conduit or tubing type and material.
C. Manufacturers: Subject to compliance with requirements, provide products produced by one of the following (or equal):
1. Non-Metallic Conduit:
a. Certainteen b. Cantex c. Picoma d. Sceptor e. Carlon 2. Raceway Fittings:
a. Amoco Chemicals Corp.
b. Appleton Electric Co.
c. Carlon d. Crouse Hinds e. Efcor Division f. ETP-Uni-Couple g. O.Z. Gedney Co.
h. Raco, Inc.
i. Republic Steel Corp.
j. Steel City
RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS 26 0533 - 4 D. Solvent cements and adhesive primers shall have a VOC content of 510 and 550 g/L or
less, respectively, when calculated according to 40 CFR 59, Subpart D (EPA Method 24).
E. Expansion Fittings: Match conduit type, rated for environmental conditions where installed.
2.4 BOXES, ENCLOSURES, AND CABINETS
A. Boxes, enclosures, and cabinets installed in wet locations shall be listed for use in wet locations.
B. Sheet Metal Outlet and Device Boxes: NEMA OS 1 and UL 514A.
C. Cast-Metal Outlet and Device Boxes: Comply with NEMA FB 1, ferrous alloy, Type FD, with gasketed cover.
D. Luminaire Outlet Boxes: Nonadjustable, designed for attachment of luminaire weighing 50 lb. Outlet boxes designed for attachment of luminaires weighing more than 50 lb shall be listed and marked for the maximum allowable weight.
E. Cabinets:
1. NEMA 250, Type 1, galvanized-steel box with removable interior panel and removable front, finished inside and out with manufacturer's standard enamel.
2. Hinged door in front cover with flush latch and concealed hinge.
3. Key latch to match panelboards.
4. Metal barriers to separate wiring of different systems and voltage.
5. Accessory feet where required for freestanding equipment.
F. Boxes:
1. Interior Outlet Boxes: Provide galvanized steel interior outlet wiring boxes, of the type, shape, and size, including depth of box, to suit each respective location and installation; constructed with stamped knockouts in back and sides, and with threaded holes with screws for securing box covers or wiring devices.
2. Gangable boxes are not allowed
3. Box extensions used to accommodate new building finishes shall be of same material as recessed box.
4. Type for Various Locations:
a. Ceilings: 4” square or 4" octagonal, 2-1/8” deep.
b. Plaster Walls and Dry Wall: 4” square, 2-1/8” deep, with raised plaster cover to fit thickness of sheet rock wall set with face approximately 1/8"
from finished surface. Furnish shallow boxes where necessary.
c. Masonry Walls: Galvanized switch boxes made especially for masonry installations; depths of boxes must be properly coordinated for each specific installation.
d. Surface: Type FS or FD box with surface cover.
e. Special: Where above types are not suitable, furnish boxes to suit the use taking into account space available, appearance, and Code requirements.
RACEWAYS AND BOXES FOR ELECTRICAL SYSTEMS 26 0533 - 5 5. Interior Outlet Box Accessories: Provide outlet box accessories as required for
each installation, including proper covers or wall device plates, mounting brackets, wallboard hangers, extension rings, plaster rings for all boxes in plaster construction, fixture studs, cable clamps and metal straps for supporting outlet boxes, compatible with outlet boxes being used and meeting requirements of individual wiring situations.
6. Weatherproof Outlet Boxes: Provide hot dipped galvanized cast iron weatherproof outlet wiring boxes, of the type, shape, and size, including depth of box, with threaded conduit ends, fiberglass reinforced cover plate with spring- hinged waterproof caps suitably configured for each application, including face place gasket corrosion-resistant fasteners.
7. Interior junction and Pull Boxes: Provide 14 gauge, galvanized welded sheet steel junction and pull boxes, with screw-on covers, of the type, shape, and size, to suit each respective location and installation.
8. Conduit Bodies: Provide galvanized cast metal conduit bodies, of the type, shape, and size, to suit each respective location and installation, constructed with threaded conduit ends, removable cover, and corrosion-resistant screws.
9. Bushings, Knockout Closures, and Locknuts: Provide corrosion resistant punched-steel box knockout closures, conduit locknuts, and insulated conduit bushings of the type and size to suit each respective use and installation.
PART 3 - EXECUTION
3.1 RACEWAY APPLICATION
A. Outdoors: Apply raceway products as specified below, unless otherwise indicated:
1. Exposed Conduit: Galvanized rigid steel conduit.
2. Concealed Conduit, Aboveground: Rigid steel conduit.
3. Connection to Vibrating Equipment (Including Transformers Motor-Driven Equipment): LFMC.
4. Boxes and Enclosures, Aboveground: NEMA 250, Type 3R.
B. Indoors: Apply raceway products as specified below, unless otherwise indicated:
1. Exposed, Not Subject to Physical Damage: EMT or PVC Schedule 80.
2. Exposed and Subject to Severe Physical Damage: Galvanized rigid steel conduit.
3. Concealed in Ceilings and Interior Walls and Partitions: EMT or PVC Schedule 80.
4. Connection to Vibrating Equipment Including Transformers and Hydraulic, Pneumatic, or Motor-Driven Equipment: FMC, except use LFMC in damp or wet locations.
5. Damp or Wet Locations: Galvanized Rigid steel conduit or PVC Schedule 80.
6. Boxes and Enclosures: NEMA 250, Type 1, except use NEMA 250, Type 4, in damp or wet locations.
C. Minimum Raceway Size: 1/2-inch trade size for non-communication systems. 3/4-inch trade size for communication systems.
D. Raceway Fittings: Compatible with raceways and suitable for use and location.
